The RIDGID MaxSelect 1/4 in. 18/24-Volt Impact Driver has a high-torque motor and gearbox design for powerful driving. This impact driver directs torque down the screw's shaft for easy fastening. Its die-cast gearbox helps provide reliable and durable usage. For easy bit changing, the impact driver features a keyless chuck. It is compatible with both 24-volt and 18-volt battery systems (sold separately).